"Perhaps this speaks to some larger trend within society today... A prevailing desire on the part of indie developers to recreate the entire world into one where you can charge more than $15 for your game design degree coursework." - Yahtzee

Raw satellite data require corrections and filtering, especially the water where any elevation glitches are very easy to spot. Gorges are the most problematic - lying in radar shadow, with many gaps and noise. River Ardeche before and after our multi-stage water level filter